Replace [TreatNullAs=functionName] with [StrictTypeChecking]

Source/bindings/scripts/unstable/v8_interface.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 496 matching lines @@
         'is_null_expression': is_null_expression(idl_type),
         'name': cpp_name(getter),
         'v8_set_return_value': v8_types.v8_set_return_value(idl_type, 'element', extended_attributes=extended_attributes, script_wrappable='collection'),
     }
 
 
 def property_setter(setter):
     idl_type = setter.arguments[1].idl_type
     extended_attributes = setter.extended_attributes
     return {
+        'has_strict_type_checking':
+            'StrictTypeChecking' in extended_attributes and
+            v8_types.is_wrapper_type(idl_type),
+        'idl_type': idl_type,
         'is_custom': 'Custom' in extended_attributes,
         'name': cpp_name(setter),
         'v8_value_to_local_cpp_value': v8_types.v8_value_to_local_cpp_value(
             idl_type, extended_attributes, 'jsValue', 'propertyValue'),
     }
 
 
 def property_deleter(deleter):
     idl_type = deleter.idl_type
     if idl_type != 'boolean':
@@ skipping 104 matching lines @@
         deleter = next(
             method
             for method in interface.operations
             if ('deleter' in method.specials and
                 len(method.arguments) == 1 and
                 method.arguments[0].idl_type == 'DOMString'))
     except StopIteration:
         return None
 
     return property_deleter(deleter)